planets

English translation unavailable for planets.

Inventions

  1. What's the best invention ever? Why? Who invented it?
  2. What's the worst invention ever? Why? Who invented it?
  3. Who's the most famous inventor that you know? What are his inventions?
  4. What would you like to invent?
  5. Do you think time machine is a future invention?
  6. Do you think inventions always have some bad side effects?
  7. Do you think one day people can live on other planets? What inventions do they need to realize this dream?
  8. Do you know any inventor who was not successful when he was alive?
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